1.The Newest Bluetooth 5.1 Version: Compliant to version 5.0 specifications, backwards compatible to Bluetooth 5.0/4.2/4.1/4.0/3.0/2.0/1.0.2. Supports NFC : Built-in chip,you can directly connect with the NFC mobile phone or other support NFC bluetooth device by touch this receiver3. Stream Music on 2 Speakers Simutaneously: With both 3.5mm and 2RCA connection options, you can enjoy music Wirelessly on 2 speakers simulteneously.4. Support dual audio port to connect: Come With both 3.5mm and 2RCA audio port, Suitable for more devices (3.5mm cable and 2RCA cable included).5. Long-Range Wireless Connection: The wireless Bluetooth adapter supports the connection up to 10 meters/33 feet, controlling the music playing in a long distance.Support auto TURN ON/OFF: Using the charger cable connect with your car/other power, When Start the car or its have power, It will auto turn on,and Automatically connect to the device you last connected to. When the car turned off, its will auto turn off.size: 69 x 69 x 24mmMaterial: ABScolour: blackPackage Contents:1 x Bluetooth 5.1 Audio Receiver Adapter1 x 3.5mm Aux Cable1 x 2RCA Cable1 x Charge CableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.